Subscriber Discussion

Camera Selection For Shadow Area / Video Analytic (Line Crossing) Recommendation

Undisclosed Integrator #1

•Mar 31, 2017

We are monitoring a fence line for intrusion/line crossing detection. The lighting from the lot is casting a shadow along the fence line, which is making it difficult to detect anything.

1) Any recommendations on perhaps setting changes in the camera, and/or perhaps a different camera altogether?

2) We are having issues with false alarms using the cameras built in video analytics (line crossing detection). Any recommendations on experience with video analytics that may actually work?

All suggestions are much appreciated.

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John Honovich

•Mar 31, 2017

IPVM

First rough thought is to use / add IR illumination down the fenceline to help balance out / lighten to the dark area.

Related, what camera / analytics are you currently using?

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(1)

Undisclosed Integrator #1

•Mar 31, 2017

In reply to John Honovich

We are using the line crossing detection built into the Hikvision 4MP Matrix IR Dome Cameras.

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(1)

John Honovich

•Mar 31, 2017

IPVM

In reply to Undisclosed Integrator #1

Is the image you shared the FoV of that camera? If so, can you consider adding a second camera with a higher focal length / narrower FoV that just aims down the fenceline? That could help improve the lighting of the fenceline area you want analyzed.

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(1)

Jon Dillabaugh

•Mar 31, 2017

Pro Focus LLC

Consider changing out the 4MP with a Darkfighter model. Also, like John mentioned, a narrower AOV would help with pixel density, which should improve your analytics performance.

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(2)

Gert Molkens

•Apr 03, 2017

IPVMU Certified

If the fence is the main interest, put the camera in corridor mode (after changing/adding as stated above).

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Ino Quandus

•Jul 30, 2017

IPVMU Certified

In reply to Gert Molkens

Dear Gert,

Im struggling with the same issue. Do you mean turning the camera sideways? We also use Hikvision, can you automatically adjust the viewing angle in the cam so it displays well on all VMS and apps?

Thanks.

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Jay Hobdy

•Jul 30, 2017

IPVMU Certified

In reply to Ino Quandus

Some cameras have a corridor mode that allows the proportions/scale to be rotated. Instead of 16:9, it would be 9:16 I suppose.

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Ino Quandus

•Jul 30, 2017

IPVMU Certified

Dear Undisclosed Integrator #1,

I was just wondering, since I'm struggling with the same issue, did you find the best solution for this challenge yet?

HIKvision seems to have a dark fighter maybe for this, in which they claim:

0.002 Lux @ (F1.2, AGC ON),
0.0027 Lux @ (F1.4, AGC ON),
0 Lux with IR

Any experiences on ones like these (anyone?)?

Thanks.

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John Honovich

•Jul 30, 2017

IPVM

In reply to Ino Quandus

Serge, there are multiple models of Darkfighter. In general, though, they work quite well in low light, though how well depends on the version. Related: Hikvision Darkfighter 1/2" Imager Camera Tested

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(1)

Greg Cortina

•Jul 30, 2017

....and this is why people use thermal cameras. Yes, I'm from FLIR but we aren't the only game in town anymore. This is a perfect example.

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Ino Quandus

•Jul 30, 2017

IPVMU Certified

Hi Greg,

I have 0 experience with thermal but thanks for the tip, the only usage of the cams would be in low light / night periods so maybe for the perimeter thermal is an option.

Any suggestions?

Thanks.

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Ino Quandus

•Jul 30, 2017

IPVMU Certified

Ahh, prices range well over 3000 dollar, now i see the downside :)

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Jon Dillabaugh

•Jul 30, 2017

Pro Focus LLC

In reply to Ino Quandus